A girl pushes on the classroom door to open it. Which two terms accurately describe the
net force acting on the door?
A. contact and balanced
B. contact and unbalanced
C. noncontact and balanced
D. noncontact and unbalanced

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) determine the magnitude and direction of projectile velocity at t= 1.3s b) determine the magnitude and direction of projectile acceleration at t=1.3s

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter